>1BLJ_1|Chain A|P55 BLK PROTEIN TYROSINE KINASE|Mus musculus (10090) GSVAPVETLEVEKWFFRTISRKDAERQLLAPMNKAGSFLIRESESNKGAFSLSVKDITTQGEVVKHYKIRSLDNGGYYISPRITFPTLQALVQHYSKKGDGLCQKLTLPCVNLA